McNichols Stair Treads vs. ASTM Standards: Which Grade Actually Meets Your Job Requirements?

There's no single answer to which McNichols stair tread you should buy. It depends entirely on your situation—traffic load, environmental exposure, warranty requirements, and how much your client cares about liability. I've seen projects where the cheapest tread was perfect, and others where going with the economy option cost the contractor $22,000 in replacement costs. So let's break it down by scenario.

The Three Scenarios

Based on what I see in quality audits and post-installation complaints, most stair tread decisions fall into one of three buckets:

• Scenario A: High-traffic, safety-critical – Think industrial plants, public stairwells, loading docks. Failure isn't an option.
• Scenario B: Moderate traffic, cost-sensitive – Office back-of-house, maintenance catwalks, storage mezzanines. It needs to be safe, but there's budget pressure.
• Scenario C: Light duty or temporary – Event staging, residential basement stairs, construction access. It won't see daily abuse.

The mistake I see most often? Contractors in Scenario A trying to use a tread that belongs in Scenario C because it was cheaper. Or, just as common, someone in Scenario C buying industrial-grade tread that's way overengineered and wasting $4,000 on a job where a basic grade would have lasted 20 years anyway.

Scenario A: High-Traffic, Safety-Critical Environments

If you're specifying for a factory floor, a municipal building, or any space that sees constant foot traffic (or gets inspected by OSHA), don't mess around. This is where you want McNichols' Heavy-Duty Safety Treads or a custom grating stair tread meeting ASTM A36 or equivalent.

These are typically fabricated from 11-gauge steel or thicker, with a serrated or slip-resistant surface. The key specs to verify:

ASTM F1637 – Standard Practice for Safe Walking Surfaces. This covers the slip resistance requirement. If your tread doesn't meet this, and someone gets hurt, you're exposed to liability. I've rejected batches where the pattern depth was 0.003" under spec—small difference on paper, but it measurably reduced grip in wet testing.

In a Q1 2024 audit, we reviewed 300+ stair tread installations across five industrial sites. Every one that had a slip incident (three total) used a tread that technically met 'industry standard' but didn't meet the specific ASTM F1637 criteria for that environment. The difference? About $2.50 per linear foot on the tread cost. On a 50,000-unit annual order, that's $125,000—but the cost of one lawsuit is easily four times that.

I'll be honest: I made the classic beginner mistake in my first year. I approved a batch of treads that looked fine, matched the drawing dimensions, but had a slight surface imperfection—about 0.5% of the surface area. We shipped 1,000 units to a chemical plant. Six months later, corrosion started at those imperfection points, and we had to replace 800 units at $18,000. The spec didn't call out surface finish requirements, so technically we met the contract. But the client was right to be angry.

Scenario B: Moderate Traffic, Cost-Sensitive Jobs

This is where most commercial projects land. Think office maintenance areas, warehouse crosswalk stairs, or apartment building back stairs. You need safety, but the tread won't see 500 people a day.

McNichols' Standard Safety Treads (typically 14-gauge steel) are a good fit here. They meet basic slip resistance specs but aren't as heavy-duty as the industrial options. The trade-off is cost—about 30-40% cheaper than the heavy-duty series for comparable dimensions.

Here's where the total cost thinking comes in. I've seen contractors pick the absolute cheapest tread from an online supplier (not McNichols, but a generic competitor) that was 16-gauge with minimal surface treatment. It cost $14 per unit less. Over a 200-unit job, that's $2,800 saved. But:

• Installation took 20% longer because the thinner material flexed during mounting
• Two units arrived damaged (thinner material bends easier in shipping)
• After 18 months, surface wear was visible in high-contact areas

The 'savings' evaporated. Honestly, I'd rather see someone in this scenario go with McNichols' standard grade than try to save another 10% by going to a no-name supplier. The quality control at McNichols—their verification protocol I've reviewed—catches gauge variations and surface defects that smaller shops miss.

A rule of thumb I use: If the job has an expected lifespan of 10+ years, don't go below 14-gauge for steel treads. The cost difference between 16-gauge and 14-gauge on a single job is usually under $400 total. The lifespan difference is easily 5-8 years.

Scenario C: Light Duty or Temporary Use

Now for the scenario that's actually more common than people admit: temporary access, event staging, residential basement stairs, or construction site access that will be removed after a year. In these cases, the cheapest option that doesn't actively create a hazard is often the right choice.

McNichols' BudgetLine or economy treads (sometimes 16-gauge, plain surface) work fine here. You don't need the heavy serration, you don't need heavy-duty galvanization, and you don't need ASTM compliance for a temporary structure that's not for public use.

But—and this is important—I've seen people misuse this category. A contractor bought budget treads for a residential apartment complex thinking 'it's just a few stairs per unit.' Except:

• The complex had 80 units, each with one set of stairs: 320 treads total
• Expected lifespan by the client: 15+ years
• Traffic: moderate (2-4 people per unit per day)

In my first year, I made a similar error—assumed 'standard' meant the same thing to every vendor. It doesn't. The budget treads started showing rust at the cut edges within 14 months. We had to replace them at our cost. The client was (rightfully) unhappy.

So when is Scenario C actually appropriate?

• Event staging that will be disassembled after 6 months
• Construction access for a 9-month building project
• Residential basement or garage stairs with light, occasional use
• Display or mock-up use only

How to Tell Which Scenario You're In

Here's a quick checklist I use when I'm reviewing job specs. Answer these three questions:

1. Who will walk on this? Is it the general public? Employees? Just me and my family? Public use = Scenario A. Employees only = Scenario B. Personal use = Scenario C.
2. How often? More than 50 people per day? Scenario A. 10-50? Scenario B. Under 10? Scenario C.
3. How long does it need to last? 15+ years? Don't go below Scenario B spec. 5-10 years? Scenario B is fine. Under 5 years? Scenario C might work.

If you're still not sure, I'd recommend erring on the higher spec. The cost difference between Scenario B and C on a typical 100-tread project is about $600-$900. The cost of replacing 100 treads prematurely—materials, labor, disruption—is easily $5,000-$8,000. That's the kind of total cost math that's easy to ignore in the moment.

And if you're specifying treads for a client who's asking about what is a vanity url or other marketing terms, just get the specs in writing. I've seen more disputes come from vague verbal agreements than from any technical failure.